74 lines
4.9 KiB
HTML
74 lines
4.9 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
||
|
|
<meta name="DC.Type" content="concept" />
|
||
|
|
<meta name="DC.Title" content="Overlapping fields" />
|
||
|
|
<meta name="abstract" content="Within a record format, you can define fields to overlap portions of other fields or their attribute characters; however, only one of those fields is shown on the display at a time." />
|
||
|
|
<meta name="description" content="Within a record format, you can define fields to overlap portions of other fields or their attribute characters; however, only one of those fields is shown on the display at a time." />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="pos3944.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="rzakcoverlfield" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Overlapping fields</title>
|
||
|
|
</head>
|
||
|
|
<body id="rzakcoverlfield"><a name="rzakcoverlfield"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Overlapping fields</h1>
|
||
|
|
<div><p>Within a record format, you can define fields to overlap portions
|
||
|
|
of other fields or their attribute characters; however, only one of those
|
||
|
|
fields is shown on the display at a time.</p>
|
||
|
|
<p>At run time, when processing overlapping fields within a record, the <span class="keyword">i5/OS™</span> program looks at the fields
|
||
|
|
in line and position sequence. When the <span class="keyword">i5/OS</span> operating
|
||
|
|
system finds a field whose conditioning is satisfied or that does not have
|
||
|
|
an option indicator specified, it selects that field for display and ignores
|
||
|
|
the remaining overlapping fields. The first overlapping field that does not
|
||
|
|
have an option indicator specified always stops the search, and any subsequent
|
||
|
|
overlapping fields are never displayed. In the following example, if indicator
|
||
|
|
01 is set on, FIELD1 is the only field displayed. If indicator 01 is off and
|
||
|
|
indicator 02 is on, FIELD2 is the only field displayed. FIELD3 is displayed
|
||
|
|
when neither of the others is selected.</p>
|
||
|
|
<p><a href="#rzakcoverlfield__overlap">Figure 1</a> shows how to define overlapping
|
||
|
|
fields.</p>
|
||
|
|
<div class="fignone" id="rzakcoverlfield__overlap"><a name="rzakcoverlfield__overlap"><!-- --></a><span class="figcap">Figure 1. Specify overlapping fields</span><pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
|
||
|
|
00010A 01 FIELD1 10 1 5TEXT('ONE')
|
||
|
|
00020A 02 FIELD2 5 1 5TEXT('TWO')
|
||
|
|
00030A FIELD3 2 0 1 5TEXT('THREE')
|
||
|
|
A</pre>
|
||
|
|
</div>
|
||
|
|
<p>If used incorrectly, this capability can result in problems in user and
|
||
|
|
program communication. In the following example, only one input field (FIELD4)
|
||
|
|
is specified for the record, and according to the field location specification,
|
||
|
|
this field overlaps a preceding output field. The workstation user is not
|
||
|
|
able to type in any data because FIELD1 is always the field selected for display.
|
||
|
|
The other three fields, including FIELD4, are never displayed.</p>
|
||
|
|
<p><a href="#rzakcoverlfield__nondisp">Figure 2</a> shows an example of incorrect
|
||
|
|
field specification entry.</p>
|
||
|
|
<div class="fignone" id="rzakcoverlfield__nondisp"><a name="rzakcoverlfield__nondisp"><!-- --></a><span class="figcap">Figure 2. Incorrect field specification</span><pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
|
||
|
|
00010A FIELD1 10 1 5TEXT('ONE')
|
||
|
|
00020A 21 FIELD2 5 1 5TEXT('TWO')
|
||
|
|
00030A 12 FIELD3 2 0 1 5TEXT('THREE')
|
||
|
|
00040A FIELD4 5Y 2I 1 5TEXT('FOUR')
|
||
|
|
A</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="pos3944.htm" title="Use these positions to specify the exact location on the display where each field begins.">Location for display files (positions 39 through 44)</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|